Revion
You would need to get another referral from your GP to the Bariatric registry to restart the process.
Another option would be to request from your GP for a gastroscopy to check out your pouch.
You should start a food journal to track intake and look at what bad habits has snuck in. May be ask GP for referral to a Dietician to review intake. Often it is the snacking and eating wrong that leads into weight gain. The bad habits slowly sneak back in.
You would have to demonstrate that you have gone back to basics anyways.